The man is sure that the alimony debt of a million rubles should not be paid by him, but by his brother, because he personally caught him in bed with his own wife. He is so confident in his rightness that he served time for non-payment of alimony, so long as his son did not get a penny. However, the same brother also requires a DNA test, but only for another child. On whose side will the genetic examination turn out to be?